1. Department of Pharmacy Practice, University of Rhode Island, Kingston, RI 02881, USA
2. Department of Computer Science and Statistics, University of Rhode Island, Kingston, RI 02881, USA
3. Department of Biostatistics, Brown University, Providence, RI 02912, USA
4. Medical School, University of Cyprus, 1678 Nicosia, Cyprus
5. Department of Population Health, New York University, New York, NY 10016, USA
6. Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Center, Seattle, WA 98109, USA
7. Department of Biostatistics, University of Washington, Seattle, WA 98195, USA
8. Department of Epidemiology, Brown University School of Public Health, Providence, RI 02912, USA
9. Department of Biostatistics, Yale School of Public Health, New Haven, CT 06520, USA